primary emission

primary emission

[′prī‚mer·ē i′mish·ən]
(electronics)
Emission of electrons due to primary causes, such as heating of a cathode, and not to secondary effects, such as electron bombardment.
References in periodicals archive ?
Request of offers from international bidders for the rehabilitation of primary emission control system, also design, supply, installation & commissioning of a new secondary emission control system for two 25 tons electric arc furnaces.
Exhaust gas recirculation is an established primary emission control technique for the effective suppression of NOx emission in reciprocating Internal combustion engines.
The five environmental indices that were created using primary emission data are discussed below.
It was impossible to predict quantitatively the intensity of primary emission or the signal losses due to the absorption of x-rays within the specimen.
Point Carbon predicts primary Certified Emission Reduction (CER) volume, generated by CDM projects, of 300 Mt in 2009, down 45% on last year, and primary Emission Reduction Unit (ERU) volumes, generated by JI projects, of 40 Mt, down 44% on 2008.
Smog is derived from vehicular emission from internal combustion engines and industrial fumes that react in the atmosphere with sunlight to form secondary pollutants that also combine with the primary emissions to form photochemical smog.
Primary emissions are the direct emissions: in the case of marijuana smoking, these are the particulate and gaseous combustion by-products that are inhaled by both the smoker and any exposed nonsmokers (e.
Pollutants like sulphur and other particulate matter being primary emissions from fire crackers, studies have revealed that the maximum average of PM2.
Smog chamber experiments indicate that photo-oxidation of aircraft emissions produces significant amounts of secondary PM (particulate matter), which, under typical summertime conditions, exceed the primary emissions within minutes of the exhaust leaving the engine.
The MaxxForce 15 will also follow another traditional formula--that of using exhaust gas recirculation (EGR) as its primary emissions reduction technology.
In the report, the group recommends that both primary emissions of PM and emissions of precursors to secondary PM be addressed.